GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Cadillac 🢒 2002 🢒 Seville 🢒 Body and Accessories 🢒 Wipers/Washer Systems 🢒 Headlamp Washers Inoperative

Test Description

The numbers below refer to the step numbers on the diagnostic table.

  1. Tests the operation of the headlamp washer pump relay and circuits. If the test lamp illuminates for a few seconds the headlamp washer pump is faulty.

    2.

  2. Tests the battery positive voltage supply circuit to the headlamp washer pump relay.

    3.

  3. Tests the windshield washer pump control circuit from the wiper motor to the headlamp washer pump relay.

    4.

  4. Tests the ability of the dash integration module to energize the headlamp washer pump relay.

Step

Action

Yes

No

Schematic Reference: Wiper/Washer Schematics

Connector End View Reference: Wiper/Washer Connector End Views

DEFINITION: The headlamp washers are inoperative, the windshield washers, low washer fluid indicator, and headlamps operate normal.

1

Did you perform the Wiper/Washer Diagnostic System Check?

Go to Step 2

Go to Diagnostic System Check - Wiper/Washer

2
  1. Turn the ignition ON.
  2. Turn the headlamps ON.
  3. Press the windshield washer switch.

Do the headlamp washers operate normally?

Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems

Go to Step 3

3

  1. Disconnect the headlamp washer pump connector.
  2. Connect a test lamp across the harness connector terminals.
  3. Turn the ignition ON.
  4. Turn the headlamps ON.
  5. Press the windshield washer switch.

Does the test lamp illuminate?

Go to Step 12

Go to Step 4

4

  1. Disconnect the headlamp washer pump relay.
  2. Connect a test lamp from the battery positive voltage supply circuit terminal to ground.

Does the test lamp illuminate?

Go to Step 5

Go to Step 9

5

  1. Connect a test lamp from the windshield washer pump control circuit terminal in the headlamp washer pump relay connector to ground.
  2. Turn the ignition ON.
  3. Press the windshield washer switch.

Does the test lamp illuminate?

Go to Step 6

Go to Step 10

6

  1. Connect a test lamp from battery positive voltage to the headlamp washer pump relay control circuit terminal.
  2. Turn the ignition ON.
  3. Turn the headlamp switch ON.

Does the test lamp illuminate?

Go to Step 7

Go to Step 11

7

Test the headlamp washer pump control circuit for an open or short to ground. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 18

Go to Step 8

8

Test the headlamp washer pump ground circuit for an open or high resistance. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 18

Go to Step 14

9

Repair the open or short to ground in the headlamp washer pump relay battery positive voltage supply circuit. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Is the repair complete?

Go to Step 18

--

10

Repair the windshield washer pump control circuit for an open or high resistance. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Is the repair complete?

Go to Step 18

--

11

Test the headlamp washer pump relay control circuit for an open or high resistance. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 18

Go to Step 16

12

Inspect for poor connections at the headlamp washer pump. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 18

Go to Step 13

13

Replace the headlamp washer pump. Refer to Headlamp Washer Solvent Container Replacement .

Is the repair complete?

Go to Step 18

--

14

Inspect for poor connections at the headlamp washer pump relay. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 18

Go to Step 15

15

Replace the headlamp washer pump relay.

Is the repair complete?

Go to Step 18

--

16

Inspect for poor connections at the dash integration module. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 18

Go to Step 17

17

Replace the dash integration module. Refer to Dash Integration Module Replacement in Body Control System.

Is the repair complete?

Go to Step 18

--

18

Operate the system in order to verify the repair.

Did you correct the condition?

System OK

Go to Step 3